Wei-Chiu Chuang commented on HDFS-8789:

Hi [~ctrezzo]! 
Thanks for the tool. This'll be useful for us.
You mentioned about this tool when we met. I am interested in carrying this 
forward, making this into an Apache Hadoop release.

> Block Placement policy migrator
> -------------------------------
>                 Key: HDFS-8789
>                 URL: https://issues.apache.org/jira/browse/HDFS-8789
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Chris Trezzo
>            Assignee: Chris Trezzo
>            Priority: Major
>         Attachments: HDFS-8789-trunk-STRAWMAN-v1.patch
> As we start to add new block placement policies to HDFS, it will be necessary 
> to have a robust tool that can migrate HDFS blocks between placement 
> policies. This jira is for the design and implementation of that tool.

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